body{
    background-image: url("../image/login/loginbg3.png");
}



.col-center-block {
    float: none;
    display: block;
    margin: 100px auto;
}
.formTip{
    color: #209FE7;
    margin-left: 90px;
}
#username{
    background-image: url("../image/login/loginuser.png");
    height:48px ;
    width: 343px;
}

#inputPassword{
    background: url("../image/login/loginpassword.png");
    height: 48px;
    width: 343px;
}
.btn{
    margin-left: 50px;
}